I suppose I feel that on the W. Coast there is usually no need for this tight a calculation. It's usually easy to anchor with at least a metre under the keel at LW.mm5aho wrote:Significant in that if you failed to take the other factors into account, there's a chance to have not enough margin.
In doing a similar calculations recently, I failed to take account of the other factors. Half a metre would have had me significantly aground!
However, there are exceptions . . . getting in and out of Soay harbour, for example, or the inner 'yacht berth' on the pier at Colonsay. And in July this year moved from North of the moorings at Eigg to the S. anchorage because my calcs were within half a metre and pressure was very high.
(If there is high pressure I prefer to add an extra metre to my LW calc just to be on the safe side, though the difference due to atmospheric pressure even at 1040mb is only a foot)
